ECHOear

An ECHOear is a Gemini invention aimed to streamline the largely bulky original ECHO devices while implementing more advanced and improved features, often designed specifically to cater for Vault Hunters. It functioned similarly to other ECHO devices, like providing a HUD, albeit Class-14 rather than Class-12 and a "constant wire-laser" connection to the ECHOnet.

This connection to the ECHOnet allowed access to almost every database in the universe that was within the public eye at a moment's notice, allowing Gemini's Vault Hunters to gain information on something within seconds. This ECHOnet connection could be reduced, preventing greater access to it, if the owner had been cut off by Gemini. This happened to Matt for a while, although its wire-laser link still allowed Gaige to stream to the ECHOnet.

ECHOears also contained the Vault Instincts software, which allowed the user to track the location of the Vault they may be searching for.

ECHOear software was created by Arnold Daxam, although it is unknown who in the Gemini Mechanics Department designed the ECHOear hardware and streamlined casing. It is unknown where ECHOears can be acquired apart from Gemini, but is likely they are specific to Gemini as only Gemini Vault Hunters have used them in the past.

Origin
ECHOears were designed sometime after the Vault of the Destroyer was found by the original Vault Hunters on Pandora, an event which picqued the Gemini Corporation's interest in Vaults and sparked the Gemini Vault Hunter Training Program. They were made specifically for use by Vault Hunters, as their streamlined, more simplistic designed was much more practical during combat. According to the Anomaly, it had a "multi-petapixel camera" and "DirectC-22" sound drivers, which, given the context, is likely quite impressive.